The invention relates to a method and to a device for delivering deliverable materials through a hollow chamber that is closed off from the outside air in a pressure-tight manner and that is supplied with materials (1) via a storage container (2) serving as a lock and that end in the furnace chamber via a connecting tube. The delivery of the materials within the hollow chamber closed off from the outside air in a pressure-tight manner is carried out by means of depressurized mechanical conveyors (3,5).
